Question about Miller Electric Mfg Co 903394 Deltaweld 452 MIG Welder, 3- Phase, 15 - 38 V

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Can I replace the cable from m25 gun to welder connection or need to buy the whole assembly?

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Found good quality replacement at reasonable

Posted on Mar 07, 2010

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Why go through the hassle, M25 Torch assemblies are cheap enough, guaranteed and safer, rin around suplies for the best price.

Posted on Dec 11, 2009

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Diagram of diode plate layout

You should have one contactor for the wire feed. And the tip should be hot all of the time. Trace the connections. The conductive strap from the gun whould go to one side of the main transformer secondary winding- usually to the current selector center contact.

If you disregard the diodes for a moment- the circuit completes through the ground lead. Somewhere, and it may be where the gun assembly attaches to the feed mechanism that the whole unit is shorting out- Is part of the cable from the assembly contacting the cabinet? Did you remove the feed assembly and were there insulating washers present? One of those may be knicked. Did a screw of the wrong length get put in?

The rectifiers can go into the circuit either way depending how you want it polarized- or omitted even to weld AC. Normally the rectifiers would go on the supply side, and not the ground- so it would be located betwee the current/heat switch and the strap that goes to the gun. Unless you put the insulting hardware on to islate the rectifiers from the heat sink. That heat sink is likely live that the rectifiers are mounted on, and as a result, you are shorting out the transformer. You can either iloate the heat sink with phenolic board and plasticscrews and nuts to attach to frame Or get the isolating hardware and iaolate the rectifers from the heat sink.

The grounding cable is the only thing that should be a metal to metal contact with the frame of the welder.

Sep 12, 2012 | Campbell Hausfeld MIG / Flux Core Wire...

1 Answer

Old AC180T welder has a weak arc no weld

Are you using cored wire? Or shieldgas? if the later, you may not be getting any to the gun.

If you are using solid wire without shield gas, you will get what you describe.

In the off chance you are using the correct combinations, you may have a loose connection in the circuit that adding resistance to the circuit and lowering the effective voltage at the tip. Make sure all connections are tight inside of the machine as well as the cables and gun assembly as well.

Mar 30, 2012 | Welding Tools

1 Answer

I have an older Hobart beta mig II welder and the drive motor does not work when trigger is pulled. any ideas


have you tried to by-pass the gun switch by disconnecting the gun cable (not the lead) and using a paper clip to by-pass the gun?. If the motor turns then you need to replace the gun switch if not probably the PC board fuse it's blown.

Jun 24, 2011 | Hobart Welding Tools

1 Answer

I had an arc of the wire right after the .030 drive wheel and before it feeds itself into the conduit cable. If I loosen the knob on this assembly, can I pull the conduit cable off easily?

Yes, you can. Just unplug your gun and loosen the butterfly nut that holds the gun, once unattached, unscrew the gun liner (conduit cable) and pull it out. If you feel this liner it's no longer good for you, replace it for a new one, price is around 22 dollars.

if this was useful to you please vote.

Feb 15, 2011 | Miller MATIC 140 MIG WELDING PKG w/cart...

1 Answer

Have solar 110 2172 mig welder does this mig use gas can i use flux core wire also is owners manual available

Yiu can use both innershiel and solid core wire. All you need to do is inverse the polarity for the innershield wire (gasless wire) connect the gun to the ground and ground cable to positive side.

Dec 26, 2010 | Solar Mig Welder Welding Gun Liner Parts...

1 Answer

Looking for a replacement gun for my old solar mig welder

Buy a Tweco mini gun part# 1000-1133 and an adapter part# 2500-2140, and that will solve your problem. Tweco parts are available at every Praxair location.
Get rid of the solar gun.

Dec 07, 2010 | Solar Mig Welder Welding Gun Liner Parts...

2 Answers

Machine is bump feeding the wire

That right there is how you know it needs replaced. Trust me I have one that is doing the same thing.

May 09, 2010 | Century Portable Plasma Cutter 82021

1 Answer

What type of mig gun did this uit come with & what is good repalcement if required

you didn't put the welder type down. Most come with a tweeco gun and they are the best in my opinion, the reason is the inner liner can be replaced and the tips and trigger can be replaced where others you have to replace the whole gun cable.

Nov 16, 2009 | Welding Tools

2 Answers

Bostitch N60 finish gun - air leaks out of the trigger when the air hose is connected

There is an oring that is probably broke in half, It is referred to as a purple o ring. You can buy the whole trigger assembly but I think that just replacing the one will get you going. Let me know and I will try and help more

Jul 29, 2009 | Stanley Tools Staple/Brad Nail Gun

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